EP1538898A4 - Systeme et procede d'elimination de substances biologiques et organiques nocives d'une enceinte - Google Patents

Systeme et procede d'elimination de substances biologiques et organiques nocives d'une enceinte

Info

Publication number
EP1538898A4
EP1538898A4 EP02795930A EP02795930A EP1538898A4 EP 1538898 A4 EP1538898 A4 EP 1538898A4 EP 02795930 A EP02795930 A EP 02795930A EP 02795930 A EP02795930 A EP 02795930A EP 1538898 A4 EP1538898 A4 EP 1538898A4
Authority
EP
European Patent Office
Prior art keywords
enclosure
heated air
air
filter
temperature
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP02795930A
Other languages
German (de)
English (en)
Other versions
EP1538898A1 (fr
Inventor
David E Hedman
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
THERMAPURE, INC
Original Assignee
David E Hedman
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=31714503&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1538898(A4) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by David E Hedman filed Critical David E Hedman
Publication of EP1538898A1 publication Critical patent/EP1538898A1/fr
Publication of EP1538898A4 publication Critical patent/EP1538898A4/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01M—CATCHING, TRAPPING OR SCARING OF ANIMALS; APPARATUS FOR THE DESTRUCTION OF NOXIOUS ANIMALS OR NOXIOUS PLANTS
    • A01M1/00—Stationary means for catching or killing insects
    • A01M1/24—Arrangements connected with buildings, doors, windows, or the like
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01M—CATCHING, TRAPPING OR SCARING OF ANIMALS; APPARATUS FOR THE DESTRUCTION OF NOXIOUS ANIMALS OR NOXIOUS PLANTS
    • A01M1/00—Stationary means for catching or killing insects
    • A01M1/20—Poisoning, narcotising, or burning insects
    • A01M1/2094—Poisoning, narcotising, or burning insects killing insects by using temperature, e.g. flames, steam or freezing
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01M—CATCHING, TRAPPING OR SCARING OF ANIMALS; APPARATUS FOR THE DESTRUCTION OF NOXIOUS ANIMALS OR NOXIOUS PLANTS
    • A01M19/00—Apparatus for the destruction of noxious animals, other than insects, by hot water, steam, hot air, or electricity
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01M—CATCHING, TRAPPING OR SCARING OF ANIMALS; APPARATUS FOR THE DESTRUCTION OF NOXIOUS ANIMALS OR NOXIOUS PLANTS
    • A01M21/00—Apparatus for the destruction of unwanted vegetation, e.g. weeds
    • A01M21/04—Apparatus for destruction by steam, chemicals, burning, or electricity
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L2/00—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor
    • A61L2/02—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor using physical phenomena
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L2/00—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor
    • A61L2/02—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor using physical phenomena
    • A61L2/04—Heat
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L9/00—Disinfection, sterilisation or deodorisation of air
    • A61L9/16—Disinfection, sterilisation or deodorisation of air using physical phenomena
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01M—CATCHING, TRAPPING OR SCARING OF ANIMALS; APPARATUS FOR THE DESTRUCTION OF NOXIOUS ANIMALS OR NOXIOUS PLANTS
    • A01M2200/00—Kind of animal
    • A01M2200/01—Insects
    • A01M2200/011—Crawling insects
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01M—CATCHING, TRAPPING OR SCARING OF ANIMALS; APPARATUS FOR THE DESTRUCTION OF NOXIOUS ANIMALS OR NOXIOUS PLANTS
    • A01M2200/00—Kind of animal
    • A01M2200/01—Insects
    • A01M2200/012—Flying insects

Definitions

  • the present invention relates to methods of sanitizing buildings and other enclosed or enclosable spaces. More particularly, the present invention relates to a system and method for killing and removing bacteria, viruses, fungi, toxic molds, and volatile organic compounds. Techniques of varying effectiveness have been developed using heated air or very cold air to kill termites and other organisms. Typical of these are the methods disclosed by Charles Forbes in U.S. Patent No. 4,817,329, and Hedman et al. in U.S. Patent No.
  • this method is not effective for other organisms, such as fungi, and toxic molds such as, but not limited to, aspergillus oryzae, aspergillus terreus, aspergills versicolor, cladosporium hergbarum, stachybotrys chartarum, penicillium aurantiogriseum, pencillium chrsogenum, pencillium gladrum and fusarium oxysporum.
  • many such fungi, molds and the like are a serious health hazard even when dead. Many people are allergic to the dust-like remains, i.e., allergens, of these organisms that can also cause serious health problems. This is a particular problem to persons suffering from asthma, bronchitis, pneumoconious and other respiratory ailments, and is a common contributing factor to sick building syndrome (SBS).
  • SBS sick building syndrome
  • the heated air causes certain molds, fungi, etc. to sporulate, thus releasing spores into the structure and thus dispersing the harmful biological agents and possibly contaminating the structure to a greater degree than originally presented.
  • Forbes and Hedman et al. also disclose that the heated air can be vented from open windows and the like. However, when treating a contaminated building having harmful viruses, toxic molds, etc., it is not desirable to release such contagions into the air.
  • VOCs Volatile organic compounds
  • VOCs can originate from a variety of sources. Commercial examples include by-products of printing shop operations, office machine repairs, blueprint production, photographic processing and food service operations. In residences, such VOCs can include hobbyist products, cosmetics, perfumes, personal hygiene products, aerosol sprays, tobacco smoking, pet urine and even small emissions from the bodies of the occupants. Off gassing of VOCs is often a common by-product of various building/construction materials, for example paints, adhesives, plastics, carpeting, etc.
  • VOCs are implicated with SBS for mostly two reasons.
  • the present invention resides in a system which removes harmful organic su bstances from an enclosure, such as a building, vehicle, container or other en closed structure.
  • the structure is typically prepared by positioning a plurality of temperature probes at predetermined locations within the structure.
  • a manometer is positioned to measure the pressure, as will be more fully described herein.
  • Heat-sensitive articles within the structure are protected. This can be done by covering the articles with an insulated mat.
  • fans can be positioned adjacent to the heat sensitive articles for directing the flow of heated air away from the articles during the decontamination process.
  • the contaminated area of the structure may also be physically cleaned in preparation of decontamination. This can be done by wiping, scraping, vacuuming, etc. the mold or other harmful organisms which are accessible and can be easily cleaned and removed.
  • a negative pressure is then created within the structure.
  • the ambient air within the structure is then heated to a predetermined temperature of between 110°F. and 400°F., typically by directing and distributing heated air into the enclosed structure. This causes the harmful substances in the structure to be destroyed or migrate into the ambient air.
  • the air within the structure is aggressively moved using blowers, fans, or the like to aerosolize the biological and organic substances to facilitate the removal.
  • the temperature of the structure is monitored until the predetermined temperature is achieved.
  • the pressure levels within the structure are also monitored to verify adequate negative pressure.
  • the heated air carrying the harmful substances are then removed from the structure through a filter.
  • the filter preferably comprises a high efficiency particulate arrestance filter.
  • the non-heated ambient air is directed into the structure, while continuing to remove the air through the filter.
  • the contaminated portion of the structu re is then physically cleaned after these steps have been performed.
  • FIGURE 1 is a schematic diagram showing components of the system of the present invention.
  • FIGURE 2 is a flow diagram of the method of the present invention.
  • FIGURE 1 there is seen a schematic diagram showing the components of the system of the present invention, referred to generally by the reference number 10, in use treating an enclosed structure 12.
  • the enclosed structure 12 is typically a commercial or residential building, but may be a boat, vehicle, product container or dedicated decontamination chamber.
  • a plurality of temperature sensors 14 are positioned at predetermined locations to monitor the temperature of the structure 12. Typically, these sensors 14 have thin, elongated tips that can be adhered to or pushed into materials to be heated or into suitably sized holes drilled into such materials so as to measure the surface and/or internal temperature.
  • the sensors 14 may be wired to a console 16 which displays and records the temperature at each sensor 16 in real time. Alternatively, the sensors 14 may be wireless and transmit a signal to the console 16.
  • Typical sensors 14, as for way of example and not by way of limiting, include thermal couples, thermistors, or the like connected to a computer and/or a strip chart recorder console 16.
  • a pressure measuring device such as a manometer 18, is positioned within the structure 12 so as to measure the internal pressure of the structure 12 during operation of the invention. As will be more fully described herein, it is imperative that a negative pressure be established and maintained throughout the operation of the invention in order to remove the harmful biological and organic contaminants and prevent their dispersal throughout the structure 12.
  • the manometer 18 can be linked to the console
  • One or more heaters 20 heat air to a predetermined temperature.
  • the air is heated to at least a temperature lethal to the organisms to be destroyed.
  • the air temperature is preferably raised to at least about 155°F, with optimum results generally be achieved with temperatures in the range of about 110°F to 400°F, or higher.
  • a biocide, having desirable characteristics enhanced by heat, may be introduced with the heated air.
  • a gas burning heating device 20 such as a conventional propane heater, is preferred as being particularly efficient in heating air. Any other heating arrangement, such as electrical devices, solar heaters, and- light emitting devices, may be used if desired. Heated air (and biocide, if used) from the one or more heaters 20 is directed through blower 22 (which may, if desired, be a component of the heater 20) which injects the hot air into the enclosed structure 12 through at least one inlet duct 24. Generally, a plurality of inlet ducts 24 will be used to
  • the inlet ducts 24 preferably include variable flow dampers and may be moved while the system is in operation to achieve uniform temperatures in all areas of the structure being treated, as sensed by sensors 14 and observed at console 16. Moisture may be introduced with the heated air.
  • At least one outlet duct 26 is provided to allow the air to be removed from the structure 12.
  • a blower or vacuum 28 is connected to the outlet duct 26 in order to remove air from the interior of the structure 12 and create negative pressure within the structure 12. Typically, this negative pressure is created before the heated air is introduced into the structure 12.
  • ULPA filter or the like coupled with the vacuum/blower 28.
  • the filter or air scrubber removes the remains of the organisms and VOCs from the air to prevent them from reaching the environment.
  • Other filters such as charcoal filters or UV filters may be employed as well.
  • blowers 30 or fans are positioned within the structure 12 to aggressively move the air within the structure to further enhance the removal of harmful biological and organic substances by aerosolizing the biological and organic substances and aid in heat distribution.
  • fans 32 may be positioned strategically within the
  • the first step is to prepare the structure, as indicated in block (1 OO).
  • the preparation in the structure also includes physical 5 cleaning of contaminated areas of the structure (102) while the area is under a negative pressure.
  • This can include vacuuming, wiping, scraping, etc. of various surfaces which have been contaminated with harmful biological contaminants, such as mold, fungi, etc. In extreme cases, this may require the removal of carpeting, section of walls, etc.
  • the invention is 0 intended to neutralize and remove these biological and organic contaminants without requiring resort to such extreme measures in some instances.
  • the plurality of temperature indicating and pressure measuring probes 14 and 18 are placed in predetermined locations as indicated in block (104) to assure that the required temperature levels are achieved.
  • the probes 14 can be read directly, although preferably they are connected by wires or wireless means to the console 16, so that all probes 14 and 18 can be monitored conveniently and the data recorded in real time.
  • inlet duct 24 When the enclosed structure 12 is sealed, at least one inlet duct 24 and at least one outlet duct 26 are then installed as indicated in block (106). O Generally, a plurality of inlet ducts 24 is preferred. Although each duct 24 may enter the enclosed structure 12 separately, the use of one inlet duct 24 connected to a manifold from which plural ducts extend to predetermined locations within the enclosed structure 12 is preferred. Ducts 24 may enter the structure 12 through any suitable opening, such as an open window or 5 door with the remainder of the window or door blocked by a panel.
  • the appropriate air scrubbing filters and vacuum devices 28 for facilitating the removal of the heated air and filtering the harmful substances therefrom, is installed, as indicated in block (108).
  • a negative pressure is established within the structure d (110). This is accomplished using the vacuum/blower device 28 as described above. Using the pressure measuring manometer device 18, the internal pressure of the structure is measured and it is verified that sufficient negative pressure is present (112). Typically, the establishment of negative pressure is performed before any heat is introduced into the structure in order to begin the removal of any loose and aerosolized contaminants, and prevent their sporulation before heat is introduced.
  • Heated air (and moisture, if desired) is then directed into the inlet ducts 24 (114).
  • Flow of the heated airthroughthe enclosed structure 12 may range in time from a few hours to several days to provide optimum results.
  • the temperature probes 14 are monitored (116) and these results recorded in real time (118) to ensure that the intended areas within the structure 12 are properly treated.
  • the heated air which has been circulated through the structure 12 is continually removed through an air scrubber filter to remove the remains of the destroyed organisms and VOCs.
  • the inlet and outlet ducts 24 and 26 may be moved to assure uniform temperatures throughout the structure, as indicated by the temperature probes 17 and temperature monitoring console 16.
  • This entire process may often be completed in five to twelve hours, allowing a business to be closed for only one day or a residential structure
  • the structure 12 is then physically cleaned
  • Samples and specimens may betaken of the previously contaminated areas to verify the desired results (126) and a physical examination of the structure can be used to verify the removal of the contagions and harmful substances.

Abstract

L'invention porte sur un système et un procédé d'élimination de substances biologiques et organiques nocives d'une enceinte, d'un véhicule, ou d'un conteneur, et de protection des articles thermosensibles s'y trouvant. A cet effet on place dans l'enceinte plusieurs sondes de température en des points déterminés, puis on chauffe l'air enclos à une température donnée d'environ 400 °F pour tuer les organismes et amener les substances nocives à migrer vers l'air ambiant. Le système tue efficacement les moisissures, les virus, les bactéries, et réduit les niveaux d'allergènes et de composés organiques volatiles.
EP02795930A 2002-08-12 2002-12-18 Systeme et procede d'elimination de substances biologiques et organiques nocives d'une enceinte Withdrawn EP1538898A4 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US218150 1980-12-19
US10/218,150 US6892491B2 (en) 1999-05-28 2002-08-12 System and method for removing harmful biological and organic substances from an enclosure
PCT/US2002/040542 WO2004014134A1 (fr) 2002-08-12 2002-12-18 Systeme et procede d'elimination de substances biologiques et organiques nocives d'une enceinte

Publications (2)

Publication Number Publication Date
EP1538898A1 EP1538898A1 (fr) 2005-06-15
EP1538898A4 true EP1538898A4 (fr) 2007-05-16

Family

ID=31714503

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02795930A Withdrawn EP1538898A4 (fr) 2002-08-12 2002-12-18 Systeme et procede d'elimination de substances biologiques et organiques nocives d'une enceinte

Country Status (5)

Country Link
US (1) US6892491B2 (fr)
EP (1) EP1538898A4 (fr)
AU (1) AU2002360656A1 (fr)
CA (1) CA2494686C (fr)
WO (1) WO2004014134A1 (fr)

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US7837932B2 (en) * 1999-05-28 2010-11-23 Thermapure, Inc. Method for removing or treating harmful biological organisms and chemical substances
US20050013727A1 (en) * 2002-12-05 2005-01-20 Hedman David E. System and process for removing or treating harmful biological and organic substances within an enclosure
US8221678B2 (en) * 2002-02-20 2012-07-17 Hedman David E System and process for removing or treating harmful biological and organic substances within an enclosure
US8272143B1 (en) 2002-02-20 2012-09-25 David Hedman System and process for removing or treating harmful biological and organic substances within structures and enclosures
US8256135B2 (en) * 1999-05-28 2012-09-04 Thermapure, Inc. Method for removing or treating harmful biological and chemical substances within structures and enclosures
US20050246942A1 (en) * 2004-05-07 2005-11-10 Mueller A C Method of extermination utilizing heated air
US7469500B2 (en) * 2005-01-05 2008-12-30 Lovelace Reginald B Nematode extermination in place using heat blankets
WO2006116809A1 (fr) * 2005-05-02 2006-11-09 Asiaworld Shipping Services Pty Ltd Procédé d’enlèvement de gaz résiduel amélioré
US20070023980A1 (en) * 2005-07-11 2007-02-01 Mimoun Abaraw Pest control system
ES2495065T3 (es) * 2005-11-22 2014-09-16 Prestige Air-Technology Limited Método y aparato para la protección de edificios
US9226491B2 (en) * 2006-11-17 2016-01-05 Prestige Air-Technology Limited Method of protecting buildings from termite attack
US9574343B2 (en) * 2006-11-17 2017-02-21 Prestige Air-Technology Limited Method of protecting buildings from termite attack
US7451568B2 (en) * 2007-03-06 2008-11-18 Tom Hoshall Subsurface insect detection and pesticide injection system
GB2462066B (en) * 2008-07-18 2010-06-16 Dbk Technitherm Ltd Improvements in and relating to drying of water damaged buildings
US7926222B2 (en) * 2008-09-25 2011-04-19 Molnar Christopher J Insect eradication system and method
US8693855B2 (en) * 2009-05-07 2014-04-08 Cambridge Engineering, Inc Infra-red heater assembly
US8388222B2 (en) * 2010-02-09 2013-03-05 Gary Joseph Potter Device for indicating eradication of a pest infestation
US9010017B2 (en) * 2010-10-19 2015-04-21 Michael Southard Apparatus and method for controlling bedbugs
US8756857B2 (en) 2011-01-14 2014-06-24 Technologies Holdings Corp. Hydronic heating system and method for pest control
US8720109B2 (en) 2011-01-25 2014-05-13 Technologies Holdings Corp. Portable heating system for pest control
GB201103899D0 (en) 2011-03-08 2011-04-20 Dbk David & Baader Gmbh Improvements in and relating to drying of water damaged buildings
US9226489B2 (en) 2011-03-18 2016-01-05 Ecolab Usa Inc. Heat system for killing pests
US8479439B2 (en) * 2011-04-06 2013-07-09 Technologies Holding Corp. Self-contained heating unit for thermal pest control
US9247725B2 (en) * 2011-06-06 2016-02-02 Technologies Holdings Corp. Packaged terminal climate unit for pest control
US9101125B2 (en) 2012-04-06 2015-08-11 Elizabeth Knote Heat chamber for termination of bed bugs and other arthropods
US8726539B2 (en) 2012-09-18 2014-05-20 Cambridge Engineering, Inc. Heater and controls for extraction of moisture and biological organisms from structures
CN105394015A (zh) * 2015-11-27 2016-03-16 中国水产科学研究院渔业机械仪器研究所 一种太阳能机械控制苦草生长的方法
US10670337B2 (en) 2016-01-04 2020-06-02 Dbk David + Baader Gmbh Apparatus for drying rooms
US20220040623A1 (en) * 2020-08-07 2022-02-10 Bohde John Mold and fungal (mycotoxin) toxin remediation

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US6279261B1 (en) * 1998-06-10 2001-08-28 Binker Materialschutz Gmbh Thermal pest control
WO2002060247A1 (fr) * 2001-01-24 2002-08-08 Hedman David E Systeme et procede d"elimination de substances organiques dangereuses d"un endroit clos

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See also references of WO2004014134A1 *

Also Published As

Publication number Publication date
AU2002360656A1 (en) 2004-02-25
EP1538898A1 (fr) 2005-06-15
US6892491B2 (en) 2005-05-17
US20020189154A1 (en) 2002-12-19
CA2494686A1 (fr) 2004-02-19
CA2494686C (fr) 2009-09-15
WO2004014134A1 (fr) 2004-02-19

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Legal Events

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